[Freeze]

There's definitely not enough space in the back for anything.

Perhaps you could try for an in gearbox 3034 FET, which is what I'm going to do when I get some wiring.

I have the original Magpul PMAGs (not the new PTS EPMs) and they fit fine and feed fine now (I had nozzle problems), in fact have a bit of a wobble. The included midcap I got with mine is all sorts of SUPER TIGHT in the magwell.

Not sure on using a 11.1, but the wiring is 18 AWG and running a 7.4V LiPo already makes the wiring heat up very quickly in mine. I'm also using a Hi-Torque motor and a 12:1 gearset.

I'd say that I'm gonna try out hexmags and get back to you but that isn't gonna be until at least a week later.